package juc.demo01;

import java.util.List;
import java.util.UUID;
import java.util.concurrent.CopyOnWriteArrayList;

/**
 * 线程不安全
 */
public class NotSafeDemo {
    public static void main(String[] args) {
       /* List<String> list = Arrays.asList("a", "b", "c");

        list.forEach(System.out::println);*/
        List list = new CopyOnWriteArrayList();
        for (int i = 0; i < 3; i++) {
            new Thread(() -> {
                list.add(UUID.randomUUID().toString().substring(0, 8));
                System.out.println(list);
            }, String.valueOf(i)).start();
        }
//        for (int i = 0; i < 3; i++) {
//            list.add(UUID.randomUUID().toString().substring(0, 8));
//            System.out.println(list);
//        }
    }
}
